Make a Hand Crank Doorbell

Quantity

Product details

Use the gears, bike bell, screws, washers, nuts, etc. to build a doorbell for your room

Learn about how the crank, rack, pinion, and cogwheels work

Turn the crank, watch the gears start turning, then push the hammer that hits the bell. Once it is all put together, you can paint your doorbell whatever colour you like - make it stand out or blend in to the wall, door frame or door

There are 4 holes on the plank so you can screw it to your bedroom door